Unfortunately this doesn't feel good enough to even justify playing a full game.

- The puzzles it's serving don't look very interesting or well-constructed. Are they randomly generated or from some existing puzzle DB?

- I'd really like to navigate the grid with arrow keys, not just by pointing and clicking.

- The app doesn't allow changing an already entered number, only undoing it.

- There's no support for pencilmarks that I can see. That's an absolute requirement for a digital Sudoku implementation.

- The app doesn't allow selecting multiple squares (for modifying all of them at once, or just for visualization).

Sorry if this sounds harsh, but the problem is that by making a Sudoku app you're setting up a comparison to all the existing ones. Apps like SudokuPad have amazing ergonomics, a ton of features, and a seemingly endless number of expertly crafted puzzles. It's not a comparison you can do well at. Picking a different type of puzzle with less competition might work out better.

It seems I got an ambiguous sudoku puzzle. https://i.imgur.com/AUiLP7J.png

I read somewhere that sudoku puzzles should always only have one solution or they don't count as "real" sudoku puzzles.

It is now harder than it was this morning (UK time). That's a shame. As someone with little idea what to do to solve it it was just perfect. Now I am at sea. Many of the comments here are from people who do Sudoku and probably won't use your site. With me you had a sector. That might be worth considering.

Also you really should store the puzzle in application storage (eg local storage) so it is persistent over page refresh, and have a "new puzzle" button.

I entered an incorrect number and it won't let me change it??

The keyboard input is not being activated. I tried adding it to home (as a PWA, but didn’t see a difference.)

I’d love to play it regularly, could you give me a heads up when you fix the keyboard issue? Thanks for sharing!

That's fun. Creating the puzzles must be quite complex.

I hate it when it tell you a mistake was made. Part of the challenge is figure out where you made the mistake or start over

This is a nice clean start. For inspiration, check out https://app.crackingthecryptic.com/94Qq6qGjh2 for the next set of features you could add. Important ones are the ability to make "pencil marks"

Thanks, 2:51. Very clean UI for mobile. I'll bookmark and do a puzzle every morning with my wordles.

Nice. Always like a game of Sudoku. Did it in 6:10.

Love it! 07:43 :-)

Really enjoyed it! 6:20 oo

Nice! 5:28

super cool, 5:51